Boom and mast support



FIG. 1 is a front perspective view as seen from bottom and to the left side showing our design;

FIG. 2 is a front elevational view of the design;

FIG. 3 is an rear elevational view of the design;

FIG. 4 is a bottom plan view of the design;

FIG. 5 is a top plan view of the design;

FIG. 6 is a left side elevational view of the design; and,

FIG. 7 is a right side elevational view of the design. 

The ornamental design for a boom and mast support, as shown and described. 